Configuration for UNIX

Profile Parameters

The ideal parameter settings depend on the hardware resources available (main memory and swap space) on the one hand, and the system load on the other, that is, the maximum/average number of (active) users working on an application server.

The default values of the profile parameters are recommended by SAP. The default settings depend on which UNIX is in use, and whether the platform is 64 or 32 bit. Run report RSPFPAR in transaction SE38 to see the system and user-defined parameter values.

In particular on 32 bit platforms an application may terminate due to one of the limits. In this case you can increase the value of individual parameters, but you must make sure you only have 2GB of address space, and that one process does not use up all the memory.

The main parameters concerned are:

• ztta/roll_extension_dia: EM Limit for Dialog Work Processes

• ztta/roll_extension: Limit for Extended Memory

• abap/heap_area_dia: Heap Memory Limit for Dialog Work Processes

• abap/heap_area_nondia: Heap Memory Limit for Non-Dialog

• abap/heap_area_total: Total Limit for Heap Memory

Swap Space

Configure sufficient swap space. SAP recommends 20 GB swap space for 64 bit systems.